CN2291965Y

CN2291965Y - High tightness star-type ash-discharged valve

Info

Publication number: CN2291965Y
Application number: CN 97202378
Authority: CN
Inventors: 钟汉鼎; 钟汉光; 胡望明; 张鉴琦
Original assignee: Sintering Plant Of Wuhan Iron And Steel (group) Co; Xiangtan Golden China Environmental Protection Tool Machinery Factory; Wang Jiwang Li Shuyan Niu Hong
Current assignee: Sintering Plant Of Wuhan Iron And Steel (group) Co; Xiangtan Golden China Environmental Protection Tool Machinery Factory; Wang Jiwang Li Shuyan Niu Hong
Priority date: 1997-03-10
Filing date: 1997-03-10
Publication date: 1998-09-23
Anticipated expiration: 2007-03-10

Abstract

The utility model relates to a high air-tightness star-shaped ash discharging valve which is a discharging device for feed openings of ash buckets of industrial dust removing systems. Compared with existing star-shaped ash discharging valves, the utility model is characterized in that a pressure isolation region is arranged out of a housing (4); a bearing (11) of a main shaft is moved out of the isolation region; two grooves (13) are arranged on the main shaft; packing sets are filled in the grooves; the radial end part of a vane (16) is provided with a rubber plate (18) which is tightly contacted with the housing (4) in an elastic mode; a rubber cushion ring (8) provided with a projected water line (20) and a buried nail (19) is inlaid in an upper flange; an access opening (5) and an observing opening (6) are arranged on the housing. The utility model has the advantages of favorable air tightness, low failure rate, and convenient installation, maintenance and working condition observation.

Description

The star-like unloading valve of high-air-tightness

The utility model is to be used for the industrial dedusting system will be in dust in the ash bucket under the negative pressure operating mode and be discharged to a kind of releasing device that goes out ash system under the atmosphere operating mode.

Existing star-like unloading valve (seeing accompanying drawing 1) mainly is made up of motor and speed reducer 1, main shaft 2, impeller 3, housing 4, bearing 11, gland 14, sealing ring 15.Its bearing 11 is fixed on the housing 4, axially only depends on gland 14 and sealing ring 15 sealings, not sealing between gland 14 and the main shaft 2; Radially do not have seal approach, the blade of impeller 3 is that rigidity contacts with housing 4, because cast(ing) surface is coarse, between blade and the housing certain interval is arranged.Therefore, the sealing effectiveness of existing star-like unloading valve is poor, in the valve as stuck by foreign matter, also need unload valve and get rid of, and also unloads grey operating mode because of not observing, and causes not unsnatch that just to shut down the ash bucket material stock too much, has perhaps unstowed and not shutdown and seriously leaking gas.Bearing 11 is worked between positive negative pressure, and dust enters easily and makes its wearing and tearing, is difficult to change the fault rate height.

The purpose of this practical institute type is to overcome above-mentioned shortcoming, and a kind of star-like unloading valve of high-air-tightness is provided, and easy access and understanding operating mode.

For this reason, main corrective measure of the present utility model is: a pressure isolation district is set outside housing, bearing 11 is moved on to outside the isolated area, on main shaft, establish the twice groove, fill out packing in the groove, add rubber slab in the longitudinal end of blade, upper flange imbeds the rubber washer that a band protrudes waterline; If access hole and observation panel.

Further specify below in conjunction with drawings and Examples:

Fig. 1 is the schematic diagram of existing star-like unloading valve;

Fig. 2 is the perspective view of this unloading valve;

Fig. 3 is isolated area and main shaft seal schematic diagram;

Fig. 4 is the sectional schematic diagram that blade tip adds rubber slab;

Fig. 5 is the sectional schematic diagram of upper flange embedding rubber slab packing ring.

Embodiment: new star-like unloading valve comprises pressure isolation district 4, dust cover 10, bearing 11, the lubricating cup 12 (seeing Fig. 2,3) that motor 1 and cycloidal planetary gear speed reducer, main shaft 2, housing 4, access hole 5, observation panel 6, flange 7, seal washer 8, steel plate 3 constitute.

Axially taked following seal approach (see figure 3):

Do a circular enclosure and connect at housing 4 external application steel plates with housing 4, cavity 9 promptly is a pressure isolation district, main shaft 2 is extended to outside the isolated area 9, dress bearing 11, bearing 11 is in atmosphere like this, do not bear pressure differential, only add dust cover and get final product, reduced the sealing area at main shaft and impeller end place after shifting out.

At impeller end dress sealing ring 15, on add gland 14, when main shaft 2 rotated, the part dust was got in the gland, helps improving air-tightness, formed the sealing of first road.Establish twice groove 13 on main shaft, fill out packing in the groove, two grooves are separately positioned on the junction of main shaft and isolated area steel plate and gland 14, form second and third road sealing.The pressure in pressure isolation district 9 is between the negative pressure in atmospheric pressure and the housing 4, also helps sealing.

Seal approach is a (see figure 4) in the footpath: the longitudinal end at the blade 16 of impeller is fixed a rubber slab 18 with pressing plate 17 and screw, like this during wheel rotation, blade tip is that rubber slab 18 contacts with the housing elastic tight rather than the rigidity contact, has foreign matter also can not be stuck in the valve.In order to make rubber slab 18 after gauge wear, can also keep closely contacting with housing, can on rubber slab 18, open elongated hole, unclamp behind the screw after will its outer moving fixing again.

In order further to improve air-tightness, upper flange 7 is except that having bolt hole, and other opens some eyelets, rubber washer 8 following prefabricated rubber is buried nail 19 be pressed in the eyelet by force, packing ring 8 surfaces then have protrudes waterline 20, connects with feed opening after upper flange 7 and rubber washer 8 are involutory again.

In order to get rid of the faults of falling in the housing 4 such as foreign matter, establish access hole 5 on the housing.In order to observe the discharging operating mode, establish observation panel 6.

The utility model is compared with existing star-shaped dust-discharging valve, because more perfect axial seal measure and footpath are arranged To seal approach, its air-tightness is improved greatly, fault rate reduces greatly, has prolonged service life, again Owing to be provided with access hole and observation panel, also easy access and observation operating mode. This unloading valve can improve dedusting Device dust collection effect and unload grey effect, and failure rate is low, maintenance load is few.

Claims

1, the star-like unloading valve of high-air-tightness, comprise motor 1 and cycloidal planetary gear speed reducer, main shaft 2, housing 4, flange 7, sealing ring 8, dust cover 10, bearing 11, lubricating cup 12, it is characterized in that a pressure isolation district 9 is arranged outside housing 4, bearing 11 is away from the atmosphere of housing 4 outside isolated area 9, twice groove 13 is arranged on the main shaft 2, fill out packing in the groove, in the longitudinal end of blade 16 rubber slab 18 with housing 4 tight Elastic Contact is arranged, upper flange 7 is embedded with the rubber washer 8 that a band protrudes waterline and buries nail, and housing is provided with access hole 5, observation panel 6